Control of the effective pressure in the cylinder of a spark-ignition engine
by electric magnetic valve 2019-01-1201
This paper describes a method and system for controling the effective pressure in the cylinder of an IC engine with the aim of improving engine efficiency. In this design, modified in accordance with a reported patent, compression ratio was increased
by means of modifying the engine head. The main goal of proposed modification is to introduce
the possibility of modifying the amount of air accumulated in the cylinder at the beginning
of the compression stroke. This can be achieved in two ways: by building a release valve into
a separate canal in the engine head or by employing an additional valvetrain operation system
with the aim of managing engine valve movement independently of camshaft motion.
The presented work is focused on an electrically actuated engine intake valve. In this design, valvetrain was modified by introducing an autonomous intake valve operation with the use
of a specially designed electromagnetic actuator.